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-rw-r--r--board/fads/fads.c876
1 files changed, 876 insertions, 0 deletions
diff --git a/board/fads/fads.c b/board/fads/fads.c
new file mode 100644
index 0000000..3b97f51
--- /dev/null
+++ b/board/fads/fads.c
@@ -0,0 +1,876 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <mpc8xx.h>
+#include "fads.h"
+
+/* ------------------------------------------------------------------------- */
+
+#define _NOT_USED_ 0xFFFFFFFF
+
+#if defined(CONFIG_DRAM_50MHZ)
+/* 50MHz tables */
+const uint dram_60ns[] =
+{ 0x8fffec24, 0x0fffec04, 0x0cffec04, 0x00ffec04,
+ 0x00ffec00, 0x37ffec47, 0xffffffff, 0xffffffff,
+ 0x8fffec24, 0x0fffec04, 0x08ffec04, 0x00ffec0c,
+ 0x03ffec00, 0x00ffec44, 0x00ffcc08, 0x0cffcc44,
+ 0x00ffec0c, 0x03ffec00, 0x00ffec44, 0x00ffcc00,
+ 0x3fffc847, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x11bfcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x33bfcc4f, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xc0ffcc84, 0x00ffcc04, 0x07ffcc04, 0x3fffcc06,
+ 0xffffcc85, 0xffffcc05, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+const uint dram_70ns[] =
+{ 0x8fffcc24, 0x0fffcc04, 0x0cffcc04, 0x00ffcc04,
+ 0x00ffcc00, 0x37ffcc47, 0xffffffff, 0xffffffff,
+ 0x8fffcc24, 0x0fffcc04, 0x0cffcc04, 0x00ffcc04,
+ 0x00ffcc08, 0x0cffcc44, 0x00ffec0c, 0x03ffec00,
+ 0x00ffec44, 0x00ffcc08, 0x0cffcc44, 0x00ffec04,
+ 0x00ffec00, 0x3fffec47, 0xffffffff, 0xffffffff,
+ 0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x11bfcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x33bfcc4f, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xe0ffcc84, 0x00ffcc04, 0x00ffcc04, 0x0fffcc04,
+ 0x7fffcc06, 0xffffcc85, 0xffffcc05, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+const uint edo_60ns[] =
+{ 0x8ffbec24, 0x0ff3ec04, 0x0cf3ec04, 0x00f3ec04,
+ 0x00f3ec00, 0x37f7ec47, 0xffffffff, 0xffffffff,
+ 0x8fffec24, 0x0ffbec04, 0x0cf3ec04, 0x00f3ec0c,
+ 0x0cf3ec00, 0x00f3ec4c, 0x0cf3ec00, 0x00f3ec4c,
+ 0x0cf3ec00, 0x00f3ec44, 0x03f3ec00, 0x3ff7ec47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x11bfcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x33bfcc4f, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xc0ffcc84, 0x00ffcc04, 0x07ffcc04, 0x3fffcc06,
+ 0xffffcc85, 0xffffcc05, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+const uint edo_70ns[] =
+{ 0x8ffbcc24, 0x0ff3cc04, 0x0cf3cc04, 0x00f3cc04,
+ 0x00f3cc00, 0x37f7cc47, 0xffffffff, 0xffffffff,
+ 0x8fffcc24, 0x0ffbcc04, 0x0cf3cc04, 0x00f3cc0c,
+ 0x03f3cc00, 0x00f3cc44, 0x00f3ec0c, 0x0cf3ec00,
+ 0x00f3ec4c, 0x03f3ec00, 0x00f3ec44, 0x00f3cc00,
+ 0x33f7cc47, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x11bfcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
+ 0x0cafcc00, 0x33bfcc47, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xe0ffcc84, 0x00ffcc04, 0x00ffcc04, 0x0fffcc04,
+ 0x7fffcc04, 0xffffcc86, 0xffffcc05, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+#elif defined(CONFIG_DRAM_25MHZ)
+
+/* 25MHz tables */
+
+const uint dram_60ns[] =
+{ 0x0fffcc04, 0x08ffcc00, 0x33ffcc47, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fffcc24, 0x0fffcc04, 0x08ffcc00, 0x03ffcc4c,
+ 0x08ffcc00, 0x03ffcc4c, 0x08ffcc00, 0x03ffcc4c,
+ 0x08ffcc00, 0x33ffcc47, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fafcc04, 0x08afcc00, 0x3fbfcc47, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fafcc04, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
+ 0x01afcc4c, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
+ 0x31bfcc43, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x80ffcc84, 0x13ffcc04, 0xffffcc87, 0xffffcc05,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+const uint dram_70ns[] =
+{ 0x0fffec04, 0x08ffec04, 0x00ffec00, 0x3fffcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fffcc24, 0x0fffcc04, 0x08ffcc00, 0x03ffcc4c,
+ 0x08ffcc00, 0x03ffcc4c, 0x08ffcc00, 0x03ffcc4c,
+ 0x08ffcc00, 0x33ffcc47, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fafcc04, 0x08afcc00, 0x3fbfcc47, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fafcc04, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
+ 0x01afcc4c, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
+ 0x31bfcc43, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xc0ffcc84, 0x01ffcc04, 0x7fffcc86, 0xffffcc05,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+const uint edo_60ns[] =
+{ 0x0ffbcc04, 0x0cf3cc04, 0x00f3cc00, 0x33f7cc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0ffbcc04, 0x09f3cc0c, 0x09f3cc0c, 0x09f3cc0c,
+ 0x08f3cc00, 0x3ff7cc47, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fefcc04, 0x08afcc04, 0x00afcc00, 0x3fbfcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fefcc04, 0x08afcc00, 0x07afcc48, 0x08afcc48,
+ 0x08afcc48, 0x39bfcc47, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x80ffcc84, 0x13ffcc04, 0xffffcc87, 0xffffcc05,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+const uint edo_70ns[] =
+{ 0x0ffbcc04, 0x0cf3cc04, 0x00f3cc00, 0x33f7cc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0ffbec04, 0x08f3ec04, 0x03f3ec48, 0x08f3cc00,
+ 0x0ff3cc4c, 0x08f3cc00, 0x0ff3cc4c, 0x08f3cc00,
+ 0x3ff7cc47, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fefcc04, 0x08afcc04, 0x00afcc00, 0x3fbfcc47,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x0fefcc04, 0x08afcc00, 0x07afcc4c, 0x08afcc00,
+ 0x07afcc4c, 0x08afcc00, 0x07afcc4c, 0x08afcc00,
+ 0x37bfcc47, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xc0ffcc84, 0x01ffcc04, 0x7fffcc86, 0xffffcc05,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x33ffcc07, 0xffffffff, 0xffffffff, 0xffffffff };
+
+
+#else
+#error dram not correct defined - use CONFIG_DRAM_25MHZ or CONFIG_DRAM_50MHZ
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+ uint k;
+
+ puts ("Board: ");
+
+#ifdef CONFIG_FADS
+ k = (*((uint *)BCSR3) >> 24) & 0x3f;
+
+ switch(k) {
+ case 0x03 :
+ case 0x20 :
+ case 0x21 :
+ case 0x22 :
+ case 0x23 :
+ case 0x24 :
+ case 0x3f :
+ puts ("FADS");
+ break;
+
+ default :
+ printf("unknown board (0x%02x)\n", k);
+ return -1;
+ }
+
+ printf(" with db ");
+
+ switch(k) {
+ case 0x03 :
+ puts ("MPC823");
+ break;
+ case 0x20 :
+ puts ("MPC801");
+ break;
+ case 0x21 :
+ puts ("MPC850");
+ break;
+ case 0x22 :
+ puts ("MPC821, MPC860 / MPC860SAR / MPC860T");
+ break;
+ case 0x23 :
+ puts ("MPC860SAR");
+ break;
+ case 0x24 :
+ puts ("MPC860T");
+ break;
+ case 0x3f :
+ puts ("MPC850SAR");
+ break;
+ }
+
+ printf(" rev ");
+
+ k = (((*((uint *)BCSR3) >> 23) & 1) << 3)
+ | (((*((uint *)BCSR3) >> 19) & 1) << 2)
+ | (((*((uint *)BCSR3) >> 16) & 3));
+
+ switch(k) {
+ case 0x01 :
+ puts ("ENG or PILOT\n");
+ break;
+
+ default:
+ printf("unknown (0x%x)\n", k);
+ return -1;
+ }
+
+ return 0;
+#endif /* CONFIG_FADS */
+
+#ifdef CONFIG_ADS
+ printf("ADS rev ");
+
+ k = (((*((uint *)BCSR3) >> 23) & 1) << 3)
+ | (((*((uint *)BCSR3) >> 19) & 1) << 2)
+ | (((*((uint *)BCSR3) >> 16) & 3));
+
+ switch(k) {
+ case 0x00 : puts ("ENG - this board sucks, check the errata, not supported\n");
+ return -1;
+ case 0x01 : puts ("PILOT - warning, read errata \n"); break;
+ case 0x02 : puts ("A - warning, read errata \n"); break;
+ case 0x03 : puts ("B \n"); break;
+ default : printf ("unknown revision (0x%x)\n", k); return -1;
+ }
+
+ return 0;
+#endif /* CONFIG_ADS */
+
+}
+
+/* ------------------------------------------------------------------------- */
+int _draminit(uint base, uint noMbytes, uint edo, uint delay)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+ /* init upm */
+
+ switch(delay)
+ {
+ case 70:
+ {
+ if(edo)
+ {
+ upmconfig(UPMA, (uint *) edo_70ns, sizeof(edo_70ns)/sizeof(uint));
+ }
+ else
+ {
+ upmconfig(UPMA, (uint *) dram_70ns, sizeof(dram_70ns)/sizeof(uint));
+ }
+
+ break;
+ }
+
+ case 60:
+ {
+ if(edo)
+ {
+ upmconfig(UPMA, (uint *) edo_60ns, sizeof(edo_60ns)/sizeof(uint));
+ }
+ else
+ {
+ upmconfig(UPMA, (uint *) dram_60ns, sizeof(dram_60ns)/sizeof(uint));
+ }
+
+ break;
+ }
+
+ default :
+ return -1;
+ }
+
+ memctl->memc_mptpr = 0x0400; /* divide by 16 */
+
+ switch(noMbytes)
+ {
+
+ case 8: /* 8 Mbyte uses both CS3 and CS2 */
+ {
+ memctl->memc_mamr = 0x13a01114;
+ memctl->memc_or3 = 0xffc00800;
+ memctl->memc_br3 = 0x00400081 + base;
+ memctl->memc_or2 = 0xffc00800;
+ break;
+ }
+
+ case 4: /* 4 Mbyte uses only CS2 */
+ {
+ memctl->memc_mamr = 0x13a01114;
+ memctl->memc_or2 = 0xffc00800;
+ break;
+ }
+
+ case 32: /* 32 Mbyte uses both CS3 and CS2 */
+ {
+ memctl->memc_mamr = 0x13b01114;
+ memctl->memc_or3 = 0xff000800;
+ memctl->memc_br3 = 0x01000081 + base;
+ memctl->memc_or2 = 0xff000800;
+ break;
+ }
+
+ case 16: /* 16 Mbyte uses only CS2 */
+ {
+#ifdef CONFIG_ADS
+ memctl->memc_mamr = 0x60b21114;
+#else
+ memctl->memc_mamr = 0x13b01114;
+#endif
+ memctl->memc_or2 = 0xff000800;
+ break;
+ }
+
+ default:
+ return -1;
+ }
+
+ memctl->memc_br2 = 0x81 + base; /* use upma */
+ return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+void _dramdisable(void)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+ memctl->memc_br2 = 0x00000000;
+ memctl->memc_br3 = 0x00000000;
+
+ /* maybe we should turn off upma here or something */
+}
+
+#if defined(CONFIG_SDRAM_100MHZ)
+
+/* ------------------------------------------------------------------------- */
+/* sdram table by Dan Malek */
+
+/* This has the stretched early timing so the 50 MHz
+ * processor can make the 100 MHz timing. This will
+ * work at all processor speeds.
+ */
+
+#define SDRAM_MPTPRVALUE 0x0400
+
+#define SDRAM_MBMRVALUE0 0xc3802114 /* (16-14) 50 MHz */
+#define SDRAM_MBMRVALUE1 SDRAM_MBMRVALUE0
+
+#define SDRAM_OR4VALUE 0xffc00a00
+#define SDRAM_BR4VALUE 0x000000c1 /* base address will be or:ed on */
+
+#define SDRAM_MARVALUE 0x88
+
+#define SDRAM_MCRVALUE0 0x80808111 /* run pattern 0x11 */
+#define SDRAM_MCRVALUE1 SDRAM_MCRVALUE0
+
+
+const uint sdram_table[] =
+{
+ /* single read. (offset 0 in upm RAM) */
+ 0xefebfc24, 0x1f07fc24, 0xeeaefc04, 0x11adfc04,
+ 0xefbbbc00, 0x1ff77c45, 0xffffffff, 0xffffffff,
+
+ /* burst read. (offset 8 in upm RAM) */
+ 0xefebfc24, 0x1f07fc24, 0xeeaefc04, 0x10adfc04,
+ 0xf0affc00, 0xf0affc00, 0xf1affc00, 0xefbbbc00,
+ 0x1ff77c45, 0xeffbbc04, 0x1ff77c34, 0xefeabc34,
+ 0x1fb57c35, 0xffffffff, 0xffffffff, 0xffffffff,
+
+ /* single write. (offset 18 in upm RAM) */
+ 0xefebfc24, 0x1f07fc24, 0xeeaebc00, 0x01b93c04,
+ 0x1ff77c45, 0xffffffff, 0xffffffff, 0xffffffff,
+
+ /* burst write. (offset 20 in upm RAM) */
+ 0xefebfc24, 0x1f07fc24, 0xeeaebc00, 0x10ad7c00,
+ 0xf0affc00, 0xf0affc00, 0xe1bbbc04, 0x1ff77c45,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+
+ /* refresh. (offset 30 in upm RAM) */
+ 0xeffafc84, 0x1ff5fc04, 0xfffffc04, 0xfffffc04,
+ 0xfffffc84, 0xfffffc07, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+
+ /* exception. (offset 3c in upm RAM) */
+ 0xeffffc06, 0x1ffffc07, 0xffffffff, 0xffffffff };
+
+#elif defined(CONFIG_SDRAM_50MHZ)
+
+/* ------------------------------------------------------------------------- */
+/* sdram table stolen from the fads manual */
+/* for chip MB811171622A-100 */
+
+/* this table is for 32-50MHz operation */
+
+#define _not_used_ 0xffffffff
+
+#define SDRAM_MPTPRVALUE 0x0400
+
+#define SDRAM_MBMRVALUE0 0x80802114 /* refresh at 32MHz */
+#define SDRAM_MBMRVALUE1 0x80802118
+
+#define SDRAM_OR4VALUE 0xffc00a00
+#define SDRAM_BR4VALUE 0x000000c1 /* base address will be or:ed on */
+
+#define SDRAM_MARVALUE 0x88
+
+#define SDRAM_MCRVALUE0 0x80808105
+#define SDRAM_MCRVALUE1 0x80808130
+
+const uint sdram_table[] =
+{
+ /* single read. (offset 0 in upm RAM) */
+ 0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
+ 0x1ff77c47,
+
+ /* MRS initialization (offset 5) */
+
+ 0x1ff77c34, 0xefeabc34, 0x1fb57c35,
+
+ /* burst read. (offset 8 in upm RAM) */
+ 0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
+ 0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47,
+ _not_used_, _not_used_, _not_used_, _not_used_,
+ _not_used_, _not_used_, _not_used_, _not_used_,
+
+ /* single write. (offset 18 in upm RAM) */
+ 0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47,
+ _not_used_, _not_used_, _not_used_, _not_used_,
+
+ /* burst write. (offset 20 in upm RAM) */
+ 0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
+ 0xf0affc00, 0xe1bbbc04, 0x1ff77c47, _not_used_,
+ _not_used_, _not_used_, _not_used_, _not_used_,
+ _not_used_, _not_used_, _not_used_, _not_used_,
+
+ /* refresh. (offset 30 in upm RAM) */
+ 0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+ 0xfffffc84, 0xfffffc07, _not_used_, _not_used_,
+ _not_used_, _not_used_, _not_used_, _not_used_,
+
+ /* exception. (offset 3c in upm RAM) */
+ 0x7ffffc07, _not_used_, _not_used_, _not_used_ };
+
+/* ------------------------------------------------------------------------- */
+#else
+#error SDRAM not correctly configured
+#endif
+
+int _initsdram(uint base, uint noMbytes)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+ if(noMbytes != 4)
+ {
+ return -1;
+ }
+
+ upmconfig(UPMB, (uint *)sdram_table,sizeof(sdram_table)/sizeof(uint));
+
+ memctl->memc_mptpr = SDRAM_MPTPRVALUE;
+
+ /* Configure the refresh (mostly). This needs to be
+ * based upon processor clock speed and optimized to provide
+ * the highest level of performance. For multiple banks,
+ * this time has to be divided by the number of banks.
+ * Although it is not clear anywhere, it appears the
+ * refresh steps through the chip selects for this UPM
+ * on each refresh cycle.
+ * We have to be careful changing
+ * UPM registers after we ask it to run these commands.
+ */
+
+ memctl->memc_mbmr = SDRAM_MBMRVALUE0;
+ memctl->memc_mar = SDRAM_MARVALUE; /* MRS code */
+
+ udelay(200);
+
+ /* Now run the precharge/nop/mrs commands.
+ */
+
+ memctl->memc_mcr = 0x80808111; /* run pattern 0x11 */
+
+ udelay(200);
+
+ /* Run 8 refresh cycles */
+
+ memctl->memc_mcr = SDRAM_MCRVALUE0;
+
+ udelay(200);
+
+ memctl->memc_mbmr = SDRAM_MBMRVALUE1;
+ memctl->memc_mcr = SDRAM_MCRVALUE1;
+
+ udelay(200);
+
+ memctl->memc_mbmr = SDRAM_MBMRVALUE0;
+
+ memctl->memc_or4 = SDRAM_OR4VALUE;
+ memctl->memc_br4 = SDRAM_BR4VALUE | base;
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+void _sdramdisable(void)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+ memctl->memc_br4 = 0x00000000;
+
+ /* maybe we should turn off upmb here or something */
+}
+
+/* ------------------------------------------------------------------------- */
+
+int initsdram(uint base, uint *noMbytes)
+{
+ uint m = 4;
+
+ *((uint *)BCSR1) |= BCSR1_SDRAM_EN; /* enable sdram */
+ /* _fads_sdraminit needs access to sdram */
+ *noMbytes = m;
+
+ if(!_initsdram(base, m))
+ {
+
+ return 0;
+ }
+ else
+ {
+ *((uint *)BCSR1) &= ~BCSR1_SDRAM_EN; /* disable sdram */
+
+ _sdramdisable();
+
+ return -1;
+ }
+}
+
+long int initdram (int board_type)
+{
+#ifdef CONFIG_ADS
+ /* ADS: has no SDRAM, so start DRAM at 0 */
+ uint base = (unsigned long)0x0;
+#else
+ /* FADS: has 4MB SDRAM, put DRAM above it */
+ uint base = (unsigned long)0x00400000;
+#endif
+ uint k, m, s;
+
+ k = (*((uint *)BCSR2) >> 23) & 0x0f;
+
+ m = 0;
+
+ switch(k & 0x3)
+ {
+ /* "MCM36100 / MT8D132X" */
+ case 0x00 :
+ m = 4;
+ break;
+
+ /* "MCM36800 / MT16D832X" */
+ case 0x01 :
+ m = 32;
+ break;
+ /* "MCM36400 / MT8D432X" */
+ case 0x02 :
+ m = 16;
+ break;
+ /* "MCM36200 / MT16D832X ?" */
+ case 0x03 :
+ m = 8;
+ break;
+
+ }
+
+ switch(k >> 2)
+ {
+ case 0x02 :
+ k = 70;
+ break;
+
+ case 0x03 :
+ k = 60;
+ break;
+
+ default :
+ printf("unknown dramdelay (0x%x) - defaulting to 70 ns", k);
+ k = 70;
+ }
+
+#ifdef CONFIG_FADS
+ /* the FADS is missing this bit, all rams treated as non-edo */
+ s = 0;
+#else
+ s = (*((uint *)BCSR2) >> 27) & 0x01;
+#endif
+
+ if(!_draminit(base, m, s, k))
+ {
+#ifdef CONFIG_FADS
+ uint sdramsz;
+#endif
+ *((uint *)BCSR1) &= ~BCSR1_DRAM_EN; /* enable dram */
+
+#ifdef CONFIG_FADS
+ if (!initsdram(0x00000000, &sdramsz)) {
+ m += sdramsz;
+ printf("(%u MB SDRAM) ", sdramsz);
+ } else {
+ _dramdisable();
+
+ /********************************
+ *DRAM ERROR, HALT PROCESSOR
+ *********************************/
+ while(1);
+
+ return -1;
+ }
+#endif
+
+ return (m << 20);
+ }
+ else
+ {
+ _dramdisable();
+
+ /********************************
+ *DRAM ERROR, HALT PROCESSOR
+ *********************************/
+ while(1);
+
+ return -1;
+ }
+}
+
+/* ------------------------------------------------------------------------- */
+
+int testdram (void)
+{
+ /* TODO: XXX XXX XXX */
+ printf ("test: 16 MB - ok\n");
+
+ return (0);
+}
+
+
+#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
+
+#ifdef CFG_PCMCIA_MEM_ADDR
+volatile unsigned char *pcmcia_mem = (unsigned char*)CFG_PCMCIA_MEM_ADDR;
+#endif
+
+int pcmcia_init(void)
+{
+ volatile pcmconf8xx_t *pcmp;
+ uint v, slota, slotb;
+
+ /*
+ ** Enable the PCMCIA for a Flash card.
+ */
+ pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
+
+#if 0
+ pcmp->pcmc_pbr0 = CFG_PCMCIA_MEM_ADDR;
+ pcmp->pcmc_por0 = 0xc00ff05d;
+#endif
+
+ /* Set all slots to zero by default. */
+ pcmp->pcmc_pgcra = 0;
+ pcmp->pcmc_pgcrb = 0;
+#ifdef PCMCIA_SLOT_A
+ pcmp->pcmc_pgcra = 0x40;
+#endif
+#ifdef PCMCIA_SLOT_B
+ pcmp->pcmc_pgcrb = 0x40;
+#endif
+
+ /* enable PCMCIA buffers */
+ *((uint *)BCSR1) &= ~BCSR1_PCCEN;
+
+ /* Check if any PCMCIA card is plugged in. */
+
+ slota = (pcmp->pcmc_pipr & 0x18000000) == 0 ;
+ slotb = (pcmp->pcmc_pipr & 0x00001800) == 0 ;
+
+ if (!(slota || slotb))
+ {
+ printf("No card present\n");
+#ifdef PCMCIA_SLOT_A
+ pcmp->pcmc_pgcra = 0;
+#endif
+#ifdef PCMCIA_SLOT_B
+ pcmp->pcmc_pgcrb = 0;
+#endif
+ return -1;
+ }
+ else
+ printf("Card present (");
+
+ v = 0;
+
+ /* both the ADS and the FADS have a 5V keyed pcmcia connector (?)
+ **
+ ** Paolo - Yes, but i have to insert some 3.3V card in that slot on
+ ** my FADS... :-)
+ */
+
+#if defined(CONFIG_MPC860)
+ switch( (pcmp->pcmc_pipr >> 30) & 3 )
+#elif defined(CONFIG_MPC823) || defined(CONFIG_MPC850)
+ switch( (pcmp->pcmc_pipr >> 14) & 3 )
+#endif
+ {
+ case 0x00 :
+ printf("5V");
+ v = 5;
+ break;
+ case 0x01 :
+ printf("5V and 3V");
+#ifdef CONFIG_FADS
+ v = 3; /* User lower voltage if supported! */
+#else
+ v = 5;
+#endif
+ break;
+ case 0x03 :
+ printf("5V, 3V and x.xV");
+#ifdef CONFIG_FADS
+ v = 3; /* User lower voltage if supported! */
+#else
+ v = 5;
+#endif
+ break;
+ }
+
+ switch(v){
+#ifdef CONFIG_FADS
+ case 3:
+ printf("; using 3V");
+ /*
+ ** Enable 3 volt Vcc.
+ */
+ *((uint *)BCSR1) &= ~BCSR1_PCCVCC1;
+ *((uint *)BCSR1) |= BCSR1_PCCVCC0;
+ break;
+#endif
+ case 5:
+ printf("; using 5V");
+#ifdef CONFIG_ADS
+ /*
+ ** Enable 5 volt Vcc.
+ */
+ *((uint *)BCSR1) &= ~BCSR1_PCCVCCON;
+#endif
+#ifdef CONFIG_FADS
+ /*
+ ** Enable 5 volt Vcc.
+ */
+ *((uint *)BCSR1) &= ~BCSR1_PCCVCC0;
+ *((uint *)BCSR1) |= BCSR1_PCCVCC1;
+#endif
+ break;
+
+ default:
+ *((uint *)BCSR1) |= BCSR1_PCCEN; /* disable pcmcia */
+
+ printf("; unknown voltage");
+ return -1;
+ }
+ printf(")\n");
+ /* disable pcmcia reset after a while */
+
+ udelay(20);
+
+#ifdef MPC860
+ pcmp->pcmc_pgcra = 0;
+#elif MPC823
+ pcmp->pcmc_pgcrb = 0;
+#endif
+
+ /* If you using a real hd you should give a short
+ * spin-up time. */
+#ifdef CONFIG_DISK_SPINUP_TIME
+ udelay(CONFIG_DISK_SPINUP_TIME);
+#endif
+
+ return 0;
+}
+
+#endif /* CFG_CMD_PCMCIA */
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CFG_PC_IDE_RESET
+
+void ide_set_reset(int on)
+{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+
+ /*
+ * Configure PC for IDE Reset Pin
+ */
+ if (on) { /* assert RESET */
+ immr->im_ioport.iop_pcdat &= ~(CFG_PC_IDE_RESET);
+ } else { /* release RESET */
+ immr->im_ioport.iop_pcdat |= CFG_PC_IDE_RESET;
+ }
+
+ /* program port pin as GPIO output */
+ immr->im_ioport.iop_pcpar &= ~(CFG_PC_IDE_RESET);
+ immr->im_ioport.iop_pcso &= ~(CFG_PC_IDE_RESET);
+ immr->im_ioport.iop_pcdir |= CFG_PC_IDE_RESET;
+}
+
+#endif /* CFG_PC_IDE_RESET */
+/* ------------------------------------------------------------------------- */
generated by cgit v1.1 at 2024-11-27 17:36:37 +0000